aac46307-fce9-449d-e044-00144fdd4fa6engutf8datasetdataset - DEM topographicGeoscience Australia+61 2 6249 9966+61 2 6249 9960GPO Box 378CanberraACT2601Australiasales@ga.gov.aupointOfContact2015-03-23ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata1.1http://www.ga.gov.au/metadata-gateway/metadata/record/72760/SRTM-derived 3 Second Digital Elevation Models Version 1.02011publication72760Gallant, J.authorWilson, N.authorDowling, T.authorRead, A.authorInskeep, C.authorThe 3 second (~90m) Shuttle Radar Topography Mission (SRTM) Derived Digital Elevation Models Version 1.0 package comprises three elevation models: the Digital Surface Model (DSM; ANZCW0703014216), the Digital Elevation Model (DEM; ANZCW0703014182) and the Smoothed Digital Elevation Model (DEM-S; ANZCW0703014217). The DEMs were derived from re-sampling the 1 second SRTM models derived from the SRTM data captured by NASA in February 2000, supported by the GEODATA 9 second DEM in void areas and other supplementary layers.
DSM represents the ground surface topography as well as features above the ground, such as vegetation and man-made structures. Stripes and voids have been removed from the 1 second SRTM data to provide an enhanced and complete DSM for Australia and near-shore islands.
DEM represents ground surface topography, with vegetation features removed using an automatic process supported by several vegetation maps. This provides substantial improvements in the quality and consistency of the data relative to the original SRTM data, but is not free from artefacts. Man-made structures such as urban areas and power line towers have not been treated. The removal of vegetation effects has produced satisfactory results over most of the continent and areas with defects identified in supplementary layers distributed with the data, and described in the User Guide.
DEM-S represents ground surface topography, excluding vegetation features, and has been smoothed to reduce noise and improve the representation of surface shape. An adaptive smoothing process applied more smoothing in flatter areas than hilly areas, and more smoothing in noisier areas than in less noisy areas. This DEM-S supports calculation of local terrain shape attributes such as slope, aspect and curvature that could not be reliably derived from the unsmoothed 1 second DEM because of noise.
The 3 second DEMs do not include the hydrologically enforced product, which is only available in 1 second resolution. The 3 second DEMs were released under Creative Commons attribution licensing in ESRI Grid format. Further information can be found in the supplementary layers supplied with the data and in the User Guide.Commonwealth of Australia (Geoscience Australia)ownerCommonwealth of Australia (Geoscience Australia)02 6249 996602 6249 9960Cnr Jerrabomberra Ave and Hindmarsh DrGPO Box 378CanberraACT2601Australiasales@ga.gov.aucustodianasNeededDEM topographicDEMthemeTopologyAustralian and New Zealand Standard Research Classification (ANZSRC)2008-03-31+11:00publicationAustralian Bureau of Statistics (ABS)http://www.abs.gov.au/ausstats/abs@.nsf/Latestproducts/1297.0Main%20Features32008?opendocument&tabname=Summary&prodno=1297.0&issue=2008&num=&view=owner9780642483584otherRestrictionslicenselicenseotherRestrictionsCreative Commons Attribution 4.0 International Licenceunclassifiedengutf8elevation113.0154.0-44.0-10.0pdfUnknownArcGIS-gridUnknownGeoscience Australia+61 2 6249 9966+61 2 6249 9960GPO Box 378CanberraACT2601Australiasales@ga.gov.audistributor90.0http://www.ga.gov.au/products-services/how-to-order-products/sales-centre.htmlhardcopyhttp://www.ga.gov.au/corporate_data/72760/3sec_SRTM2_DEMs_UserGuide_v1.0.3.pdfWWW:DOWNLOAD-1.0-http--download3sec_SRTM2_DEMs_UserGuide_v1.0.3.pdfDownload the file (pdf) [12 MB]downloaddatasetUnknownunclassified